It's been a hectic week in the world of business, from a Office Depot prematurely announcing a big merger to analysts raising their price targets on Google, to Burger King getting hacked. Here's a rundown of this week's biggest wins and losses.

One of the bolder initiatives Starbucks announced during last week's quarterly conference call was that 60 percent of the 1,500 new U.S. locations the barista-tended chain plans to open through the next five years will have drive-thru windows.

Fast-food workers are joining the movement to unionize in protest over low pay. More than 200 workers at Burger King, Wendy's, McDonald's, and other fast-food restaurants recently went on strike in New York -- and organizers say it was just the start of a larger campaign.

McDonald's is showing signs of weakness. Goldman Sachs downgraded it shares due to a slowdown in growth. And with challenges overseas and resurgent competition everywhere, things are unlikely to turn around anytime soon for the world's largest restaurant chain.McDonald's is showing signs of tarnish on the Golden Arches. Goldman Sachs downgraded its shares due to a slowdown in growth. And with challenges overseas and resurgent competition everywhere, things are unlikely to turn around anytime soon for the world's largest restaurant chain.

This is a big week for Wendy's. For the first time in its 42-year history, the burger chain is remaking its signature sandwich. It's a bid to compete with "gourmet" burger shops that are growing in popularity. Still, it's going to take more than menu tweaks for Wendy's to turn things around.